topic Re: error H71, heatlink disconnected, no heating in Nest Thermostats

error H71, heatlink disconnected, no heating

vkharch — Sat, 09 Oct 2021 22:17:48 GMT

Hi, Nest thermostat come up with an error H71. I’ve checked the heat link and it seems to be dead, no light at all. There’s power going to it and my boiler, and there is hot water but no heating. I’ve tried resetting and restarting it, switch off power for few minutes and still nothing. Nest has been installed along with a new boiler just under a year ago. Please advise.

Re: error H71, heatlink disconnected, no heating

Rivendell63 — Sat, 09 Oct 2021 22:40:29 GMT

I have a similar problem. Previously working without issue and now nothing. No lights, no response. It has power, but I now have no heating in my house due to premature failure of an expensive piece of technology

Re: error H71, heatlink disconnected, no heating

LisaT — Sun, 10 Oct 2021 11:03:59 GMT

Exact same thing happening with me. Very frustrating.

Re: error H71, heatlink disconnected, no heating

Ralbrow — Sun, 10 Oct 2021 16:06:01 GMT

Me too.. noticed this morning.

Re: error H71, heatlink disconnected, no heating

vkharch — Sun, 10 Oct 2021 16:44:31 GMT

I've contacted Google via Twitter and got quick response, however then been referred to senior management team to review and possible replacement. However, 7 hours since last contact, all quiet and house is getting cold, not ideal with 2 kids .

The link below might be useful for some, my boiler is OpenTherm and wired differently though

I Suddenly have no lights on my heatlink. No heating. Not a fuse problem. Can’t reset it. - Google Nest Community

Re: error H71, heatlink disconnected, no heating

CaraghC — Thu, 04 Nov 2021 11:49:38 GMT

Me too same issue no heating too weeks now

Re: error H71, heatlink disconnected, no heating

Rivendell63 — Thu, 04 Nov 2021 11:53:40 GMT

Telephone the support number and they'll take all the details and pass to resolution team to arrange replacement if still under warranty

Re: error H71, heatlink disconnected, no heating

vkharch — Thu, 04 Nov 2021 12:17:27 GMT

I've got a replacement. You can either call or contact online.

There is micro USB connector under Heatlink cover, try to use mobile charger to connect to that USB port and power Heatlink that might work in the short run while waiting for replacement.

Re: error H71, heatlink disconnected, no heating

Rivendell63 — Fri, 10 Dec 2021 13:51:54 GMT

Telephone the google support line as per their website. It will still take a lil while but they will check details n arrange replacement via courier

Re: error H71, heatlink disconnected, no heating

Geoeire40 — Thu, 01 Sep 2022 17:22:46 GMT

Can you assist same thing happening with mine ?

Re: error H71, heatlink disconnected, no heating

vkharch — Thu, 01 Sep 2022 18:23:45 GMT

Hi, not sure how, apart from what was already said above. Remove top cover of the Heatlink, there is micro USB connector under Heatlink cover. I used mobile charger to connect to that USB port and that power the Heatlink while I was waiting for replacement from Google.

Re: error H71, heatlink disconnected, no heating

Ade3 — Tue, 25 Oct 2022 08:12:58 GMT

How do I call